Answer / loganath

voltages which are mentioned will be used in distribution
applications where fault current must be limited to limit
the loss of life and machines, hence it is earthed to
through resistance or reactance, earth fault relays must be
very sensitive enough to snip earth faults in these systems

Answer / avdheshlakhera

You need to limit earth fault current in medium voltage
system if rotating machines are connected to the system.By
adding NGR E/F current is limited hence during earth fault
in motors or in generators there will be less core damages.
This will reduce repairing cost of machines (Repairing of
core damages are very costly in large machines). Only thing
you need to do with resistance grounding system is to
select sensetive relays and set them correctly.

Answer / ramachandran.s

to limit the fault current so as to minimise the fault
current. the system can run with a single fault. when
second earth fault occur the system will trip of fail. so
when the first fault occur corrective step has to be taken
to rectify the fault. thus neutral is earthed thro'
resistance or reactance will increase the relability of the
system

Answer / anwar

To limit the Fault current,it has to be conencted to be
earthed .

why do we have 230v a.c. as general voltage for domestic supply rather than others?

2 Answers  

---

how to deside the capacity of chock for drive?

0 Answers   Essar,

---

WHAT IS DIFFERENCE BETWEEN POTENTIAL DIFFERENCE AND E.M.F?

2 Answers  

---

Specify the crystal frequency required for an 8085 system to operate at 1.1MHz

1 Answers  

---

how much mininmum length required to conduct a DC Hipot Test on 33kV AC Cable with 45kV DC? Is it 20meter or Less then 20?

0 Answers   ABB,

---

how to apply b license to c license in tneb

0 Answers   Billroth Hospitals,

---

What is VCC?

1 Answers  

---

How we can calculate what type of supply we need for an example sometimes we take 11 KV and sometime 33KV from EB ?

4 Answers  

---

why circuit breaker closing time is always higher then tripping / opening time.

13 Answers   United Phosphorus,

---

neutral carrying current more than phase in 3phase supply.i want to know the reason?

2 Answers  

---

What are the transformer losses?

0 Answers  

---

What is meant by full pitched winding?

0 Answers  

---